Orocos Real-Time Toolkit  2.6.0
Time.hpp
00001 /***************************************************************************
00002   tag: Peter Soetens  Wed Jan 18 14:11:39 CET 2006  Time.hpp 
00003 
00004                         Time.hpp -  description
00005                            -------------------
00006     begin                : Wed January 18 2006
00007     copyright            : (C) 2006 Peter Soetens
00008     email                : peter.soetens@mech.kuleuven.be
00009  
00010  ***************************************************************************
00011  *   This library is free software; you can redistribute it and/or         *
00012  *   modify it under the terms of the GNU General Public                   *
00013  *   License as published by the Free Software Foundation;                 *
00014  *   version 2 of the License.                                             *
00015  *                                                                         *
00016  *   As a special exception, you may use this file as part of a free       *
00017  *   software library without restriction.  Specifically, if other files   *
00018  *   instantiate templates or use macros or inline functions from this     *
00019  *   file, or you compile this file and link it with other files to        *
00020  *   produce an executable, this file does not by itself cause the         *
00021  *   resulting executable to be covered by the GNU General Public          *
00022  *   License.  This exception does not however invalidate any other        *
00023  *   reasons why the executable file might be covered by the GNU General   *
00024  *   Public License.                                                       *
00025  *                                                                         *
00026  *   This library is distributed in the hope that it will be useful,       *
00027  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00028  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00029  *   Lesser General Public License for more details.                       *
00030  *                                                                         *
00031  *   You should have received a copy of the GNU General Public             *
00032  *   License along with this library; if not, write to the Free Software   *
00033  *   Foundation, Inc., 59 Temple Place,                                    *
00034  *   Suite 330, Boston, MA  02111-1307  USA                                *
00035  *                                                                         *
00036  ***************************************************************************/
00037  
00038  
00039 #ifndef OS_TIME_HPP
00040 #define OS_TIME_HPP
00041 
00042 #include <cmath>
00043 
00044 //rint function support implemented for MSVC
00045 #include "rint.h"
00046 
00047 namespace RTT
00048 {
00049 
00053     typedef double Seconds;
00057     typedef long secs;
00061     typedef long msecs;
00065     typedef long usecs;
00069     typedef long long nsecs;
00073     typedef long long psecs;
00074 
00075     const long MSECS_IN_SECS = 1000;
00076     const long USECS_IN_SECS = 1000 * MSECS_IN_SECS;
00077     const long NSECS_IN_SECS = 1000 * USECS_IN_SECS;
00078     const long long PSECS_IN_SECS = 1000LL * NSECS_IN_SECS;
00079 
00080     const long USECS_IN_MSECS = 1000;
00081     const long NSECS_IN_MSECS = 1000 * USECS_IN_MSECS;
00082     const long PSECS_IN_MSECS = 1000 * NSECS_IN_MSECS;
00083 
00084     const long NSECS_IN_USECS = 1000;
00085     const long PSECS_IN_USECS = 1000 * NSECS_IN_USECS;
00086 
00087     const long PSECS_IN_NSECS = 1000;
00088 
00089     inline msecs secs_to_msecs(const secs s) { return s * MSECS_IN_SECS; }
00090     inline usecs secs_to_usecs(const secs s) { return s * USECS_IN_SECS; }
00091     inline nsecs secs_to_nsecs(const secs s) { return s * NSECS_IN_SECS; }
00092     inline psecs secs_to_psecs(const secs s) { return s * PSECS_IN_SECS; }
00093 
00094     inline usecs msecs_to_usecs(const msecs ms) { return ms * USECS_IN_MSECS; }
00095     inline nsecs msecs_to_nsecs(const msecs ms) { return ms * NSECS_IN_MSECS; }
00096     inline psecs msecs_to_psecs(const msecs ms) { return ms * PSECS_IN_MSECS; }
00097 
00098     inline nsecs usecs_to_nsecs(const usecs us) { return us * NSECS_IN_USECS; }
00099     inline psecs usecs_to_psecs(const usecs us) { return us * PSECS_IN_USECS; }
00100 
00101     inline psecs nsecs_to_psecs(const nsecs ns) { return ns * PSECS_IN_NSECS; }
00102 
00103     inline nsecs Seconds_to_nsecs(const Seconds s) { return nsecs( rint( s * secs_to_nsecs(1) ) ); }
00104     inline Seconds nsecs_to_Seconds(const nsecs ns) { return Seconds( ns ) / Seconds(NSECS_IN_SECS); }
00105     inline psecs Seconds_to_psecs(const Seconds s) { return psecs( rint( s * secs_to_psecs(1) ) ); }
00106     inline Seconds psecs_to_Seconds(const psecs ps) { return Seconds( ps ) / Seconds(PSECS_IN_SECS); }
00107 }
00108 
00109 #endif